I don't know if this is a known issue or not, but it does seem like you are 
hitting a
scaling issue.

I am not totally following the test flow here.  The Exception logs you gave are 
coming
as soon as mininet starts having trouble (python tracebacks) or only after you 
issue
a logout?

I think you also said that you are getting these exceptions after a clean 
reinstallation
of ODL?  You mean, after unzipping and starting again you get the exceptions, 
without
even running the mininet test?

Thanks,
JamO

On 06/22/2016 10:08 PM, Selvakumar Murugasekaran wrote:
> Hello,
> 
> Good day to you.
> 
> I am benchmarking the "*Network Discovery Size*" of ODL beryllium controller 
> for spine-leaf topology using "*spine-leaf.py*"
> in mininet.
> 
> Reference link: 
> https://github.com/ciena/mininet-topos/blob/master/spine_leaf.py
> Mininet version : 2.2.1rc1
> 
> I created *1800* switch in spine-leaf.py in mininet but it's throwing error 
> message as following,
> 
> Traceback (most recent call last):
>   File "./spine_leaf.py", line 157, in <module>
>     simpleTest(options)
>   File "./spine_leaf.py", line 129, in simpleTest
>     net.start()
>   File "build/bdist.linux-x86_64/egg/mininet/net.py", line 495, in start
>   File "build/bdist.linux-x86_64/egg/mininet/node.py", line 1207, in 
> batchStartup
>   File "build/bdist.linux-x86_64/egg/mininet/util.py", line 82, in errRun
>   File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
>     errread, errwrite)
>   File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child
>     raise child_exception
> OSError: [Errno 7] Argument list too long
> 
> *Note*: The *spine-leaf.py* does not throw any error message upto 1720 
> switch's creation.
> 
> After the above error message in mininet, the opendaylight controller also 
> throw the following java error,
> 
> Exception in thread "odl-stat-collector-36-thread-0" Exception in thread 
> "odl-stat-collector-51-thread-0"
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-50-thread-0" Exception in thread 
> "odl-stat-collector-42-thread-0"
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-35-thread-0" Exception in thread 
> "odl-stat-collector-38-thread-0"
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-47-thread-0" Exception in thread 
> "odl-stat-collector-37-thread-0"
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-46-thread-0" Exception in thread 
> "odl-stat-collector-26-thread-0"
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-48-thread-0" Exception in thread 
> "odl-stat-collector-40-thread-0" Exception in thread
> "odl-stat-collector-29-thread-0" java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-30-thread-0" 
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-21-thread-0" Exception in thread 
> "odl-stat-collector-16-thread-0" Exception in thread
> "odl-stat-collector-24-thread-0" Exception in thread 
> "odl-stat-collector-18-thread-0" Exception in thread
> "odl-stat-collector-17-thread-0" java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-15-thread-0" Exception in thread 
> "odl-stat-collector-19-thread-0"
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-14-thread-0" 
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Exception in thread "odl-stat-collector-13-thread-0" 
> java.lang.NullPointerException
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266)
>         at
> org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> 
> After the above java error, every time the opendaylight controller throw the 
> same error message during the "shutdown/logout"
> even though we did controller PC manual reboot and controller reinstall.
> 
> Could you please clarify whether this is known issue for spine-leaf topology 
> with beryllium controller?
> 
> Let me know if you need any more information.
> 
> 
> Thanks and Regards,
> Selvakumar Murugasekaran.
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